Abstract: Using InTe crystal to replace Si crystal, homochromatic X-ray light source of 1750~3500eV energy range in the 4B7A X-ray beam line on BSRF was obtained. This light source has energy resolution of more than 5000, intensity of more than 1010 phs·s^{-1, harmonics wave less than 0.1%, and it fills in the domestic gap of X-ray calibration source at this energy range. We make some researches on calibration of XRD's sensitivity using X-ray at this energy range, get results of the uncertainty of XRD's sensitivity less than 3%.}

Key words: Synchronous radiation, X-ray, Calibration, Uncertainty

摘要： 在北京同步辐射装置的4B7A X射线束线上，利用InTe双晶体替换单晶硅晶体分光，获得了1750eV~3500eV能区的单色X射线，光源的能量分辨达到5000，光源强度达到1010 phs·s^{-1，高次谐波小于0.1 %，填补了国内X射线标定源这段能区的空白。利用这段能区X射线开展了X射线探测元件灵敏度标定方法研究，给出了XRD探测器灵敏度的不确定度小于3%。}

关键词: 同步辐射, X射线, 标定, 不确定度